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Response of the tench ( Tinca tinca L.) to potassium nitrate enriched water
Author(s) -
Demaël A.,
Garin D.,
Peres G.
Publication year - 1980
Publication title -
journal of fish biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.672
H-Index - 115
eISSN - 1095-8649
pISSN - 0022-1112
DOI - 10.1111/j.1095-8649.1980.tb03684.x
Subject(s) - biology , glycogen , potassium , gluconeogenesis , osmoregulation , nitrate , endocrinology , lipolysis , medicine , zoology , fish <actinopterygii> , hormone , salinity , metabolism , ecology , fishery , chemistry , organic chemistry , adipose tissue
When the tench ( Tinca tinca L.) was exposed to a slight increase, 8.5 mg/l, in the potassium content of the water, metabolic and hormonal changes occurred which lasted more than four weeks. An initial phase of lipolysis was followed by a partial consumption of glycogen reserves, which in turn was followed by a phase of gluconeogenesis. Hyperglycaemia persisted throughout the experiment. The ion distribution in erythrocytes and liver changed relatively early; there was no observable change in water content. These changes are similar to those observed during the osmoregulation of fish.